You should have strong will power .. Its not easy to quit smoking especially for guys when they are with friends ...
So you gotta prepare for it ...
Only way it worked for me is to turn cold turkey. Sorry for the long reply but I could not help but share my experience as I thought you might be able to relate better.
The moment I determined to myself that I WON'T BE A SLAVE TO THIS IDIOTIC THING, I got inner courage to fight my urge to go back to lighting another one. Until such time I felt that I can fight this only by becoming strong in mind, I always gave some excuse to myself or came up with some unworkable strategy and would light up a cigarette. Along side I took up running as a hobby - gave me a good insight on my "health"! The more I ran, the less I felt the urge to smoke and gradually in about 3 weeks. The urge to smoke died by itself.
I also gave myself a challenge of 3 - i e challenge myself not to smoke for 3 hours, then extended that challeneg to 3 consecutive 3 hours and then 3 days, then 3 weeks and then 3 months, 3 years so on...
One point of caution : You will have a strong urge to share your victory over yourself immediately but please DON'T FALL IN THAT TRAP. This makes you over-confident and would make you try smoking again as you will feel that you have the ability to fight the urge to smoke. But believe me its not - if you give up and fall for this trap, you will end up feeling very miserable. Dont talk abt your victory till 3 years without smoking. Yes some friends/family members may remark that they dont see you smoking - to that you may just nod and agree without getting into deep clarification of your fight and how long its been since you've smoked etc..JUsT DONT DO IT.
Dont slacken on your running - no matter how slow you are or how hard you breath, continue to challeneg yourself and run everyday. Some days your body will scream for rest but dont listen to it.... i've noticed that the days you dont run, you wl like going back to smoking again - compensate the body's requirement of adrenaline (or whatever harmone it is) rush by running or eworking out in a gym.
Also avoid and stay away from NEGATIVE PEOPLE.
Best of luck and hope you start this fight/challenge right away - remember what you can start tomorrow can be started right away too. Moreover if you really want to fight this why not now?
Think about the bad breath and discoloring teeth...cancer possibilities...do you want to live long and healthy...how much do you value life?Consider what is significant to you'll...family, life, both.. the possibilities of living up to 100 years...possibilities are endless if you propose yourself to quit smoking cigarettes..good things start to fall into place...have faith